No it's not. I very much want there to be a way to spend money anonymously, but I can't frame that as a 'basic right'.
It is not in the interest of a free, fair, and just society to give such an entity the power to tax and control transactions at their leisure.
Isn't he? I don't know how it works in US, but at least in Poland every banknote has printed statement that it is "the legal payment method ". The law institutes a fine for any seller that refuses payment in cash.
Apparently Citibank stopped handling cash in Australia: http://www.businessinsider.com.au/citibank-is-the-first-aust... (not sure how that works out)
A coffee shop in Maryland stopped taking cash after several robberies https://consumerist.com/2017/02/03/sick-of-being-robbed-coff...
Salad chain Sweetgreen also stopped taking cash https://consumerist.com/2016/12/22/seeking-sweetgreen-salad-...
Also most landlords won't accept cash.
There's others, but that's just off the top of my head. I've been in card-only situations before.
Relevant statement from US Treasury: https://www.treasury.gov/resource-center/faqs/Currency/Pages...
If you want to engage in transactions without being tracked in a cashless society, you always have the option of using alternative currencies.